Post straightener for pipes, bars, and the like material



Fb.:23,1943. T, H GRAH M 2,2:11325) POST STRAIGHTENER FOR PIPES; BARS, AND THE LIKE MATERIAL Filed April 29. 1939 fiwnlar:

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I l l Patented Feb. 23, 1943 POST STRAIGHTENER FOR PIPES, BARS,

' AND THE LIKE MATERIAL Thomas H. Graham, Ellwood City, Pa., assignor to National Tube Company, a corporation of New Jersey Application April 29, 1939, Serial No. 270,851

1 Claim.

The present invention relates to an apparatus for straightening pipes, bars and the like material, and more particularly to a straightener having V-shaped pipe engaging rollers.

An object of the present invention is to provide means for adjustably supporting one of the material engaging rollers with respect to the other material engaging roller.

A further object of the present invention is the provision of V-shaped pipe or bar engaging rollers which serve as gripping means for the pipe or bar while a kink or bend is being straightened over the lower V-shaped roller.

Other objects and advantages will become apparent as the description proceeds and reference is had to the accompanying drawing, in which:

Figure 1 is a side elevation of the present invention;

Figure 2 is an elevation of Figure 1 at right angles thereto;

Figure 3 is a view similar to Figure 1 of a straightener having a V-shaped block in combination with a roll;

Figure 4 is a side View of Fi ure 3; and

Figures 5 and 6 are similar views in which V- shaped blocks are used.

In the drawing, the numeral 2 represents an upper roll bracket which is attached for vertical adjustment to the rear of a post 3 by a bracket 4. This roll bracket is made up of spaced bent steel bars secured together by bolts 5. Positioned be tween the spaced steel bars of the upper roll 2 is a top adjustment rod 6, the lower end of which is threaded to be interconnected with the bottom adjustment rod 1 by means of a turnbuckle 8. The bottom adjustment rod 1 is threaded on each end so as to be connected to the turnbuckle on one end and adjustably connected on the other end to a lower bracket 9 by the nuts I0 and II.

The upper bracket 4 is provided with an up wardly extending plate I2 positioned on one side thereof and provided with a slot |4 within which is adapted to slide the bolt I5, the latter cooperating to hold the spaced plates forming the upper roll bracket and the enlarged head Portion of the top adjustment rod 6 together.

At the top of said post 3 is bolted, or otherwise secured, in any conventional manner, a stationary roll bracket l6 comprising spaced plates secured on each side of said post. Positioned between said adjustable and stationary roll brackets, in any conventional manner, are V-shaped rollers I! so positioned and arranged with respect to each other that they have opposite points of contact upon a pipe or bar 20 passing therebetween for straightening purposes.

In the straightener shown in Figures 3 and 4, the upper roll bracket 2 is of similar construction and is supported on the post 3 by a bracket I8. The rod 6 is threaded upon its end so that the upper roll bracket is adjustable in order for the roller I! to contact the pipe or bar 20 on one wall of said pipe or bar, while a V-shaped block 2| contacts the other wall of said pipe or bar, the block 2| being positioned by an adjustable bracket 22 having a slot 23 through which a bolt 24 passes to fix the bracket to the post 3. In Figures 5 and 6, there are shown two V-shaped blocks 2| and 2| the block 2| being mounted by an arrangement much the same as shown by Figure 3 and, therefore, the same numerals being used to 7 identify the equivalent parts. In this showing, the V-shaped blocks are used to hold the tube or bar while the operator pulls down on the outer end to straighten out the kinks and bent sections. The tube 20 must be released from the frictional grip of the blocks to move from point to point in accordance with the operators judgment.

However, under theN-shaped roller construction, all that is necessary is for the operator to pull the tube or bar through the rollers in a longitudinal direction as he pulls down on it and at no time is he required to release the frictional grip of the rollers upon the pipe.

It is to be noted that in all the examples disclosed, the bending of the work necessary to straighten it places the post 3 in compression and the rod 6 in tension, the reaction location bein in all instances at the point where the rod connects with the bracket which is positioned at the lower portion of the post. In devices of this character torque is created when they are placed in operation and in prior art structures the location of this torque must occur at the top of the post where it is most apt to flex, whereby to necessitate an extremely heavy post if a stable structure is to be attained. In the present invention the torque being at the lower portion of the post, a lighter post may be used without loss of stability, the post having greater stifiness at its lower portion.

While I have shown and described specific embodiments of the present inventiomit will be seen that I do not wish to be limited exactly thereto, since various modifications may be made without departing from the scope of the invention, as defined by the following claim.

I claim:

In apparatus for straightening a pipe, bar or similar workpiece, the combination with a post having an upper end and a lower end positioned in the ground to hold the post, an upper bracket arm extending laterally from the post at substantially right angles thereto, and a similar lower bracket arm, an adjustment rod mounted in these brackets, means permitting adjustment of the adjustment rod, the said brackets holding the adjustment rod spaced away from the post and substantially parallel thereto longitudinally, the adjustment rod having an upper end and a lower end, a bracket on the upper end of the rod, a V-shaped roller in the bracket adapted to engage and retain the pipe, a second bracket mounted on the post and projecting substantially straight out beyond the upper end of the post, a V-shaped roller in the bracket similar to the above-mentioned V-shaped roller, the rollers being adapted to grip a pipe or bar at spaced opposite locations while permitting sufiicient length of the pipe or bar to extend beyond the rollers sufficiently to enable the pipe or bar to be grasped manually and straightened manually while being held between the said rollers, straightening of the work placing the post in compression and the adjustment rod in tension, the bracket arms on the post being positioned so that resulting reaction between tension and compression is transmitted to the lower bracket arm and lower portion of the post for assuring maximum rigidity of the post.

THOMAS H. GRAHAM. 

